<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="../jquery-1.7.2.min.js"></script>
    <script>
//        jq中的window.onload
//        $()
        $(function(){
            alert(1);
        })
    </script>
</head>
<body>

</body>
</html>